I had a one-owner 1950 2-door hardtop Bel Air in my high school shop for a couple of years that had a Powerglide trans, and side engine mounts. An assistant principal at the school had inherited it from his father, who bough it new. Someone had swapped a side-mount 216 from a later model car into it, according to the stamped number by the distributor. I believe the engine checked out to be a 1952 passenger car 216, by the stampings. I didn't ever tear if down far enough to confirm the bore and stroke. The car had definitely NOT had any sort of engine mount modifications, however.
Jerry
